HOMEVULNERABILITIESCVE-2026-33931
MEDIUM

CVE-2026-33931

CWE-639Published: March 26, 2026· Updated: Mar 26, 2026

6.5
CVSS v3.1
EPSS:0.04%probability of exploitation in 30 daysPercentile:10.8th

Official Description

OpenEMR is a free and open source electronic health records and medical practice management application. Prior to version 8.0.0.3, an Insecure Direct Object Reference (IDOR) vulnerability in the patient portal payment page allows any authenticated portal patient to access other patients' payment records — including invoice/billing data (PHI) and payment card metadata — by manipulating the `recid` query parameter in `portal/portal_payment.php`. Version 8.0.0.3 patches the issue.

NVD Source

Technical Analysis

CVE-2026-33931 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 6.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

open-emr1 product
openemr
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/openemr/openemr/commit/7bf30e0ec5587f80c19094d58df09d46ac328806
ADVISORYhttps://github.com/openemr/openemr/security/advisories/GHSA-hf37-5rp9-j27j

All References (3)

→
https://github.com/openemr/openemr/commit/7bf30e0ec5587f80c19094d58df09d46ac328806Patch
→
https://github.com/openemr/openemr/releases/tag/v8_0_0_3Product
→
https://github.com/openemr/openemr/security/advisories/GHSA-hf37-5rp9-j27jVendor Advisory · Exploit

Quick Facts

CVE IDCVE-2026-33931
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-639
CISA KEVNo
EPSS (30d)0.04%
Affected1 vendor
PublishedMar 26, 2026

Related CVEs (CWE-639)

CVE-2026-55255
KEV9.9
CVE-2026-29200
9.9
CVE-2026-52782
9.9
CVE-2026-45552
9.9
CVE-2018-25270
9.8
CVE-2026-24178
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-33931 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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